This article describes the impact of the engineering design stage to the building cost analysis the importance and the existing problems in the design stage to project life-cycle cost. Listing a segment of project to describe the important impact of the design and selection phase to the construction costs and effectiveness. Pointed out that the use of value engineering in the design phase is an idea to solve this problem, and how the initial proposed the use of value engineering in the design phase of the method.%介绍了工程设计阶段对建筑物造价的影响，分析了在设计阶段对工程全寿命造价的重要性和现存的问题。列举一项分部工程说明设计选型对建筑施工阶段的费用及效益产生的重要影响。指出在设计阶段运用价值工程是解决这一问题的一种思路，并初步提出如何在设计阶段运用价值工程的方法。
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